diff --git a/firmware/usb.c b/firmware/usb.c
index 4e13295509..4c122e8eea 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -478,7 +478,7 @@ static void NORETURN_ATTR usb_thread(void)
             usb_stack_enable(true);
 #ifndef BOOTLOADER
 #ifndef HAVE_USB_POWER
-            int usb_mode = USBMODE_DEFAULT;
+            int usb_mode = -1;
 #endif
             send_event(SYS_EVENT_USB_INSERTED, &usb_mode);
 #endif
diff --git a/uisimulator/common/sim_tasks.c b/uisimulator/common/sim_tasks.c
index feb88e2c58..8c1f193080 100644
--- a/uisimulator/common/sim_tasks.c
+++ b/uisimulator/common/sim_tasks.c
@@ -145,7 +145,7 @@ void sim_trigger_screendump(void)
 static bool is_usb_inserted;
 void sim_trigger_usb(bool inserted)
 {
-    int usbmode = USBMODE_DEFAULT;
+    int usbmode = -1;
     if (inserted)
     {
         send_event(SYS_EVENT_USB_INSERTED, &usbmode);